Think of insulin as the key that unlocks the door to your cells. Your body uses insulin to allow glucose, or blood sugar, to gain entry to your cells, giving you energy. If your body has a tendency to make too much insulin, following a diet to prevent blood sugar dips can help to avoid harmful symptoms.

When you give blood, you are saving lives. According to the American Red Cross, every two seconds someone in America needs blood and 38,000 blood donations are needed daily. Evidence also suggests giving blood may improve your own cardiovascular health.

Having too high or low of a level of blood sugar or blood glucose can lead to various symptoms and health problems. This can include mild symptoms if your levels are off just a small amount occasionally. You can also develop chronic diseases if your levels are off on a regular basis.

Getting enough vitamin B-12 is key to maintaining your body's ability to produce enough blood. While a B-12 deficiency can lead to a type of anemia, a blood disease that affects your red blood cells, the vitamin is not generally associated with white blood cell production.

Although peanuts are often categorized as nuts, they belong to the legume family. Peanuts can be eaten roasted in their shells, in peanut butter or roasted in oil and seasoned. Try to stick with dry-roasted peanuts to avoid peanuts that contain extra fats and choose peanuts that are free of the harmful trans fat.

Hypoglycemia occurs when the blood glucose level is too low. Blood glucose level below 70 milligrams per deciliter is considered too low and could cause harm, according to PubMedHealth.

Sickle cell disease, also called sickle cell anemia, is the most common worldwide disease that is passed through families, according to University of Iowa Health Care, or UIHC. Individuals with sickle cell anemia may suffer from painful episodes that can occur suddenly and last for days.

Calcium is the most abundant mineral in the body and functions not only in the development and maintenance of bones and teeth but also in the health of nerves, muscles and the heart. Calcium deficiency can lead to serious health problems such as bone weakening, nerve damage and heart arrythmias.

Progesterone is a hormone in both men and women that is converted into testosterone and estrogen. According to MayoClinic.com, progesterone levels typically drop with age and affect testosterone production. At the same time, estrogen levels rise in older men, creating a hormone imbalance.

Blood clots deep in the legs, called deep venous thrombosis or DVT, are a serious health concern. If a clot breaks free and travels to the lungs, it can be potentially fatal. Blood clots in the lungs are the third leading cause of death in people who are hospitalized, according to the medical text "

White blood cell production relies on an adequate intake of vitamins A, C and E and beta-carotene, which are nutrients found in many vegetables. Cancer, autoimmune disorders and infections can result in a low white blood cell count, but a diet rich in vegetables can help increase your levels.

Conditions affecting your urinary tract can make daily tasks uncomfortable. Urine is normally sterile and does not contain blood cells. The presence of white blood cells -- WBCs -- in a urine sample indicates an abnormal condition within the urinary tract or kidney.